aero catches

[Dangti6]

Flush require you to cut a hole, then pop the catch from underneath.

Plus flush require then same hole, but are more forgiving as you put the catch per the top and sink it in.

Google pic will show the differences. Plush flush are what you commonly see.

Not hard to fit, but take your time. Choose a decent location and think about the webbing underneath and where that will lie.